If you have some/any questions, please raise your hand.

[Sitifan]

1. If you have some questions, please raise your hand.
2. If you have any questions, please raise your hand.
What's the differecne in meaning between the above two sentences?
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Thank you very much for your reply.

[Yankee]

Hi Sitifan

The first sentence suggests that 'you' has already indicated that he/she has a question, or the speaker has a strong reason to believe or expect that 'you' will have questions.

In your first sentence, the situation could be that one or more students has been asking questions without raising their hand first (i.e. simply blurting out questions, interrupting the teacher and/or another student whenever and however they please).